abs brakes

i have a problem with my brakes on my 94 v6 camaro.at first i couldn't mash the brake pedal at all so people told me to change my booster so i did.well now after messing with the abs valve a bit,i have pedal,but the car won't stop completly unless i pull the parking brake.i have a brake light and abs inop light on.i also found out that my rear brakes are not working but my front are.any help would be great.

take it to a shop and see how much shit is broken

how much experience do you have in working on brake systems??? or cars in general??? i dont mean to be a prick, ive learned alot by just diving in, but the ABS system on a computer controled car is two systems working togeher, botha physical and a computer system, you can cause alot of damage if you dont know what youre doing.

i've done tons of mechanic work on cars,but i just am not very familiar with abs systems and i am trying to avoid buying parts i do not need.i just need some advice from someone who IS familiar with them.i do not need my mechanical skills questioned.thanks.by the way i do all i can to my cars and trucks because i can't afford to pay anybody else everytime something breaks.

well it seems fairly obvious to me that the problem is in the abs valve. seems that its not allowing enough pressure through to stop the car. can you un-do whatever it is that you did when you "messed with the abs valve"?

i used "messed" for lack of a better term.but,before i did anything, i could not even press the brake pedal at all.i can't un-do anything.sometimes you have to try different things and hope you don't screw up.

what do you mean by you 'couldnt even press the brake pedal at all'